diff --git a/Prediction/1. tree.r b/Prediction/1. tree.r
new file mode 100644
index 0000000..1e3903b
--- /dev/null
+++ b/Prediction/1. tree.r	
@@ -0,0 +1,9 @@
+install.packages("rpart")
+library(rpart)
+#x11()
+formula = Species~.
+iris.df=rpart(formula, data=iris)
+iris.df
+plot(iris.df)
+text(iris.df, use.n=T, cex=0.7)
+post(iris.df)
\ No newline at end of file